alignment of rocker arms? push rods too tight, not set in the dimple correct before tightened?...
they broke either because of sideways pressure or too tight on vertical pressure.. you need to figure out which one is the cause. are they out of alignment and being slammed against the holes in the head?.. did you set the valve clearance correctly or set them like they were hydraulic lifters instead of solid lifters? were each rod set into the dimple on the lifter and the dimple on the rocker arm?
best quess is wrongly aligned rocker arm shaft or too tight and or too loose so they jumped around and then jumped out of place and got caught..
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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